1 Thomas Roth Sleep Disorders & Research Center, Henry Ford Health, 1 Ford Place, Detroit, MI 48202, USA.
2 Department of Obstetrics, Gynecology, and Reproductive Biology, Michigan State University College of Human Medicine, 15 Michigan St NE, Grand Rapids, MI 49503, USA.
3 Sleep Research and Treatment Center, Department of Psychiatry and Behavioral Health, College of Medicine, Penn State University, Hershey, PA 17033, USA.